Indicating system



Jan-5, 1932. R. E. BEAR 1,840,077

INDICATING SYSTEM Filed-May 1O 1928 J Z a i; i

Inventor": Ralston E.Bear. ymww HLS Attorney r Patented Jan. 5, 1932 i aj UNITED STATES OFFICE :annsroiv E. 1am, on nos ANGEILES, CALIFORNIA;ASSIGNOR 'ro GENERAL nnnc'rmc COMPANY, A conronnrron or NEwYon'Kinmcnrme sYsrmr 1' My invention relates to indicating systems andparticularly to a systemjfor-indicating on which'of a plurality ofcircuits'a certain p v I so that the control relay'6 is not deenergizedY by the voltage relay 4 when the circuit 1 is reenergized by theclosing of the switch 3;

electrical condition occurred. I

In certain systems of distribution, arrangements are provided wherebytwo normally disconnected independently energized circuits areautomatically connected together Whenever one of the circuits becomesdeenergized'while the other is energized. 1 One object of myinvention isto providein such an arrangement an indicating arrangement whereby onemay tell whether or not the two circuits are connected together and ifthey are connected togetherwhich circuit failed and effected theconnection of the two'circuits; I g

My invention will be better understood from the following descriptiontaken in connection with-the accompanying drawing and its scope will bepointed out in the appended claim.

Referring to the drawing which is adia-V gram of an electric systemembodyinginiy. in- ,.vent1on,- 1 and 2 representtwo normallydisconnected electric c1rcu1ts which are arranged tobe energizedbysuitable sources of current,

not shown. The two circuits 1 and 2 are arranged to be connectedtogether by a suitable switch 3 which is arranged to be closedautomatically when one ofthe electric circuits becomes deenergized whilethe I other; is enerthe control relays Band 7 associated respectivelywith the voltage relays 4 and 5. The

voltage relay/l, which is connected across the circuit lby means ofapotential transformer 8 and a control switch 9, isarranged to completea circuit for the control relay 6 across the circuit 2 when the voltageof the electric circuit 1 decreases belowia predetermined value. Thecontrol relay 6 when energized eifects the completion of a circuit forthe closing coil 10 of the switch 3 so that the circuits '1 and 2areconnected together and the voltage of the circuitl is, restored toitsnormal value, The energization of the control relay 6 also completes alocking circuit for itself which is independent 'ofthe voltage relay 4The voltage relay 5 which is connected across the electric/circuit 2 bymeans of a transformer 11 and control switch 12 is arranged to completea circuitfo'r the control 1 relay 7 across the circuit 1, when. thevoltage of the circuit'2' decreases-below a predeterandthe voltage ofthe circuit 2 is restored the voltage relay 5 when the circuit 2 isreenergized by the closing of the switch 3.

In order to effect the opening of the switch the switch, an overloadresponsive'relay 14 which'is connected so as to beresponsive to thecurrent fiow through switch 3 is provided for eifectingthe openingofswitch 3. In

some cases it'ma'y be desirable to arrange the system in any suitablemanner so that the switch 3 cannot be reclosed automatically after theoverload relay has been operated.

This result may be obtained in the arrangement shown by employing anoverload relay of the type well known in the art as a lockout relaywhich is s e-arranged that it is mechanically held in its actuatedposition untilireset byhandl, Overload relay 14 is diagrammatito itsnormal value. The energization of the control relay 7 also completes alocking circuit for itself so that it is not deenergized by age failedand caused the switch to close. In

the preferred embodiment of my invention and indicating lamps G2 and R2are associated with the circuit 2. The circuits of these lamps areselectively controlled by the control relays 6 and 7 so that when theswitch 3 is open and both of the circuits 1 and 2 are energlzed thelamps G1 and G2 are lighted. If the voltage of circuit 1 fails so thatrelay 6 is operated to close the switch 3 the circuit of lamp G1 is 0ened and the circuit of lamp R1 is complete so that the lamps G2 and R1are simultaneously lighted. If, however, the voltage of circuit 2 failsso that the control relay 7 is operated to effect the closing of switch3, the circuit of lamp G2 is opened and the circuit of lamp R2 iscompleted so that the lamps G1 and R2 are simultaneously lighted.

The operation of the arrangement shown in the drawing is as follows:When both of the electric circuits are independently energized and theswitch 3 is open and the control switches 9 and 12 are closed, thevoltage relays 4 and 5 are energized and the control relays 6 and 7 aredeenergized. Under these conditions the circuit of the lamp G1 iscompleted through contacts 16 of relay 6 and the circuit of lam G2 iscompleted through contacts 17 of re ay 7 so that'the lamps G1 and G2 aresimultaneously lighted. This is an indication that both of the circuits1 and 2 are energized and the switch 3 is open.

When the voltage of the circuit 1 decreases below a predetermined valuethe voltage relay 4 operates to open its contacts 18 and close itscontacts 19. The closing of the contacts 19 completes a circuit for thecontrol relay 6. This circuit is from one terminal of the secondarywinding of transforn'ier 11 through switch 12, contacts 19 of relay 4,contacts 20 of relay 5, coil of relay 6, contacts 21 of relay 7,contacts 22 of overload relay 14, contacts of control switch 12 to theother secondary terminal of the transformer 11. Control relay 6 byclosing its contacts 23 and 24 connects the closing coil 10 of theswitch 3 across the secondary of the transformer 11 so that the switch 3is closed to connect the deenergized circuit 1 to the energized circuit2. Relay 6 b closing its contacts 25' completes a shunt circuit aroundthe contacts 19 of relay 4 and contacts 20 of relay 5. This lockingcircuit for the relay 6 maintains the coil thereof energized after thevoltage relay 4 opens its contacts 19 due to the reenergization of thecircuit 1. Relay 6 by opening its contacts 16 opens the circuit of thelamp G1 and by closing its contacts 26 completes the circuit of the lampR1 across the secondary of the transformer 11. The lighted lamps G2 andR1 are an indication that the switch 3 is closed and that the closing.thereof was effected by the deenergization of the circuit 1.

When the two circuits 1 and 2 are independently energized and thevoltage of the source 2 decreases below a predetermined minal of therelay 8. Control relay 7 by closing its contacts 30 and 31 completes thecircuit of the closing coil 10 of the switch 3 across the secondary ofthe transformer 8. Control relay 7 by closing its contacts 33 completesa shunt around the contacts 27 of the relay 5 and contacts 18 of relay4. Due to the closing of this locking circuit the relay 7 remainsenergized after the relay 5 opens its contacts 27 due to thereenergization of the circuit 2. The relay 7 by opening its contacts 17opens the circuit of the lamp G2 and by closing its contacts 34completes the circuit of the lamp R2 across the secondary of thetransformer 8. The lighted lamps G1 and R2 are an indication that theswitch 3 is closed and that the closing thereof was effected by thedeener 'zation of the circuit 2.

Whi e I have, in accordance with the patent statutes shown and describedmy invention as applied to a particular system and as embodying variousdevices diagrammatically indicated, changes and modifications will beobvious to those skilled in the art and I, therefore aim in the a pendedclaim to cover all such changes and modifications as fall within thetrue spirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is:- In combination, two normally disconnected independentlyenergized electric circuits, a switch for connecting said circuits, aclosing coil for said switch, a control relay, means whereby saidcontrol relay when energized effects the energization of said closingcoil, a voltage relay responsive to the volta e of one of said circuits,means whereby sai voltage relay effects the energization of said controlrelay when the voltage of said one of said circuits is below apredetermined value, means responsive to the energization of saidcontrol relay for maintaining said control relay energized independentlyof said voltage relay, an indicating device, and a circuit for saiddevice arranged'to be completed b said control relay when ener zed, asecon control relay, means where y said second control relay whenenergized effects the energization of said closin coil, a second voltarelay responsive to the voltage of the other circuit means whereby saidsecond voltage relay e ects the ener 'zation of said second controlrelay when t e voltage of said other circuit is below a predeterminedvalue, means 7 responsive to the energization of said second i

